- #1

grewas8

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## Homework Statement

Oliver has a mass of 59.1 kg and can throw a 558.0 g rock with a speed of 19.8 m/s. What would Oliver's recoil speed be if he were on an icy surface?

## Homework Equations

Momentum is conserved in an isolated system (when Fnet=0 or no external forces are acting on the system)

p=mv

mass(object 1)*initial velocity (object 1) + mass(object2)*initial velocity (object 2)= Mass (object 1)*final velocity (object 1) + mass (object 2)*final velocity (object 2)

## The Attempt at a Solution

m (oliver)= 59.1 kg, m(rock)= 0.588 kg, initial velocity = 19.8 m/s

p(oliver+ rock)= mv

p= (59.1+0.588)(19.8) =1181.8 kg m/s (seems quite too large--> unreasonable?)

on ice (frictionless i assume) no net external forces so Fnet=0

i don't understand what recoil velocity means? Is it the rebound velocity? would be equal and opposite?:grumpy:

***Any help would be appreciated ****